package com.quyu.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.quyu.dto.LoginFormDTO;
import com.quyu.dto.Result;
import com.quyu.dto.UserDTO;
import com.quyu.entity.User;
import com.quyu.mapper.UserMapper;
import com.quyu.service.IUserService;
import com.quyu.utils.Md5Util;
import com.quyu.utils.RegexUtils;
import com.quyu.utils.SMSUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.quyu.utils.RedisConstants.*;
import static com.quyu.utils.SystemConstants.USER_NICK_NAME_PREFIX;

@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Resource
    private UserMapper userMapper;

/*    @Override
    public Result sendCode(String phone, HttpSession session) {
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号码格式错误");
        }
        String code = RandomUtil.randomNumbers(6);
        session.setAttribute("code",code);
        //发送短信验证码,暂未实现

        log.debug("发送短信验证码成功，验证码：{}",code);

        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号码格式错误");
        }
        Object cacheCode = session.getAttribute("code");
        Object code= loginForm.getCode();
        if(cacheCode==null||!cacheCode.equals(code)){
            return Result.fail("验证码错误");

        }
        User user= query().eq("phone",phone).one();
        if(user==null){

            user=createUserWithPhone(phone);
        }
        session.setAttribute("user", BeanUtil.copyProperties(user, UserDTO.class));

        return Result.ok();
    }*/
@Override
public Result sendCode(String phone, HttpSession session) {
    // 1.校验手机号
    if (RegexUtils.isPhoneInvalid(phone)) {
        // 2.如果不符合，返回错误信息
        return Result.fail("手机号格式错误！");
    }
    // 3.符合，生成验证码
    String code = RandomUtil.randomNumbers(6);
    SMSUtils.sendMessage("阿里云短信测试","SMS_154950909",phone,code);

    // 4.保存验证码到 session
    stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);

    // 5.发送验证码
    log.debug("发送短信验证码成功，验证码：{}", code);
    // 返回ok
    return Result.ok();
}

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        // 1.校验手机号
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {
            // 2.如果不符合，返回错误信息
            return Result.fail("手机号格式错误！");
        }
        // 3.从redis获取验证码并校验
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if (cacheCode == null || !cacheCode.equals(code)) {
            // 不一致，报错
            return Result.fail("验证码错误");
        }

        // 4.一致，根据手机号查询用户 select * from tb_user where phone = ?
        User user = query().eq("phone", phone).one();

        // 5.判断用户是否存在
        if (user == null) {
            // 6.不存在，创建新用户并保存
            user = createUserWithPhone(phone);
        }

        // 7.保存用户信息到 redis中
        // 7.1.随机生成token，作为登录令牌
        String token = UUID.randomUUID().toString(true);
        // 7.2.将User对象转为HashMap存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));
        // 7.3.存储
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey, userMap);
        // 7.4.设置token有效期
        stringRedisTemplate.expire(tokenKey, LOGIN_USER_TTL, TimeUnit.MINUTES);

        // 8.返回token
        return Result.ok(token);
    }

    @Override
    public void updatePwd(Long userId, String newPwd) {
        userMapper.updatePwd(userId,newPwd);
    }

    @Override
    public Result passwordlogin(String phone, String password) {
        if(!RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式错误");
        }
        User user=query().eq("phone",phone).one();
        if(user==null){
            return Result.fail("用户不存在");
        }
        String pwd=user.getPassword();
        if(!Md5Util.getMD5String(password).equals(pwd)){
            return Result.fail("密码错误");
        }
        String token = UUID.randomUUID().toString(true);
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName, fieldValue) -> fieldValue.toString()));
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey,userMap);
        stringRedisTemplate.expire(token,LOGIN_USER_TTL,TimeUnit.MINUTES);
        return Result.ok(token);
    }

    private User createUserWithPhone(String phone) {
        User user=new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX+RandomUtil.randomNumbers(5));
        save(user);
        return user;

    }

}
